Actress Lisa Kudrow was left speechless when her six-year-old son called her a slut.Little Julian was repeating what schoolmates had told him about his mother's role in hit film Easy A, in which she plays a school guidance counsellor who has an affair with a student. She says, "I didn't let him see Easy A... and, idiot that I am, I thought so he'll never know. "But his friends talk about it and make fun of me to him. They're kids. "This honestly happened the other night, I was telling him to do something and he said, 'I don't have to listen to you, you're a slut!' He was kidding... I almost had no answer."